Troubleshooting Commands - Cisco Catalyst 4500 Series Software Configuration Manual

Configuring Device Sensor
dhcp 57:max-message-size
This is an example of the show device-sensor cache all privileged EXEC command output:
Switch# show device-sensor cache all
Device: 001c.0f74.8480 on port GigabitEthernet2/1
--------------------------------------------------
Proto Type:Name Len Value
dhcp 52:option-overload 3 34 01 03
dhcp 60:class-identifier 11 3C 09 64 6F 63 73 69 73 31 2E 30
dhcp 55:parameter-request-list 8 37 06 01 42 06 03 43 96
dhcp 61:client-identifier 27 3D 19 00 63 69 73 63 6F 2D 30 30 31 63 2E 30 66
37 34 2E 38 34 38 30 2D 56 6C 31
dhcp 57:max-message-size 4 39 02 04 80
Device: 000f.f7a7.234f on port GigabitEthernet2/1
--------------------------------------------------
Proto Type:Name Len Value
cdp 22:mgmt-address-type 8 00 16 00 08 00 00 00 00
cdp 19:cos-type 5 00 13 00 05 00
cdp 18:trust-type 5 00 12 00 05 00
cdp 11:duplex-type 5 00 0B 00 05 01
cdp 10:native-vlan-type 6 00 0A 00 06 00 01
cdp 9:vtp-mgmt-domain-type 9 00 09 00 09 63 69 73 63 6F

Troubleshooting Commands

The following commands can help troubleshoot Device Sensor.
debug device-sensor {errors | events}
•
• debug authentication all
Restrictions for Device Sensor
• Only CDP, LLDP, and DHCP protocols are supported.
• The session limit for profiling ports is 32.
The length of one TLV must not be more than 1024 and the total length of TLVs (combined length of TLVs) of all protocols
•
must not be more than 4096.
• Device Sensor profiles devices that are only one hop away.
Configuration Examples for the Device Sensor Feature
The following example shows how to create a CDP filter containing a list of TLVs:
Switch> enable
Switch# configure terminal
Switch(config)# device-sensor filter-list cdp list cdp-list
Switch(config-sensor-cdplist)# tlv name address-type
Switch(config-sensor-cdplist)# tlv name device-name
Switch(config-sensor-cdplist)# tlv number 34
Switch(config-sensor-cdplist)# end
The following example shows how to create an LLDP filter containing a list of TLVs:
Switch> enable
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
49-122
64 63 2E 64 66 34 64 2D 47 69 31 2F 30 2F 32 34
4 39 02 04 80
Chapter 49 Configuring 802.1X Port-Based Authentication